The remote camera in the back the wireless ones anyway get their power from the reverse back up lights. IF you had a full time hot 12 vdc wire back there just connect it to that camera power.I added a switch, I can turn on camera any time I want. Electrical is not my strong point so do not ask me how to do it. But if I can do it most anyone can.
I do not much care for the wireless, mine was hardwired. Wireless is a bit misleading as they have to be wired for power.The remote camera in the back the wireless ones anyway get their power from the reverse back up lights. IF you had a full time hot 12 vdc wire back there just connect it to that camera power.
I have had two RVs and a Jeep with wireless no issues. How else would you reliably power a camera without a wire to a 12 volt source?I do not much care for the wireless, mine was hardwired. Wireless is a bit misleading as they have to be wired for power.